chore(deps): bump zod from 3.25.76 to 4.3.5

Bumps [zod](https://github.com/colinhacks/zod) from 3.25.76 to 4.3.5.
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Commits](colinhacks/zod@v3.25.76...v4.3.5)

---
updated-dependencies:
- dependency-name: zod
  dependency-version: 4.3.5
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

packages/core/package.json

@@ -25,7 +25,7 @@
     "@objectstack/client": "^0.3.2",
     "@objectstack/spec": "^0.3.2",
     "lodash": "^4.17.21",
-    "zod": "^3.22.4"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "typescript": "^5.9.3",